Electronic device and method for transmitting reference signal in electronic device

Abstract

An example electronic device includes a communication processor; at least one radio frequency integrated circuit (RFIC) connected to the communication processor; at least one radio frequency front-end (RFFE) circuit connected to the at least one RFIC and configured to process a transmission signal; and a plurality of antennas connected through the at least one RFFE circuit. The communication processor may control to transmit, at a first time point when a reference signal is to be transmitted through a first antenna from among the plurality of antennas, the reference signal to a base station through the first antenna; and transmit, at a second time point when the reference signal is to be transmitted through a second antenna from among the plurality of antennas, a reference signal adjusted at least based on a signal received through the second antenna to the base station through the first antenna.

What is claimed is: 
     
       1. An electronic device comprising:
 a communication processor including processing circuitry; 
 at least one radio frequency integrated circuit (RFIC) connected to the communication processor; 
 at least one radio frequency front-end (RFFE) circuit connected to the at least one RFIC and configured to process a transmission signal; and 
 a plurality of antennas connected via the at least one RFFE circuit, 
 wherein the communication processor is configured to:
 identify a first transmit time point for transmitting a first reference signal via a first antenna among the plurality of antennas; 
 control to transmit the first reference signal to a base station via the first antenna at the first transmit time point, 
 identify a second transmit time point for transmitting a second reference signal via a second antenna among the plurality of antennas, and 
 control to transmit the second reference signal to the base station via the first antenna at the second transmit time point, the second reference signal being adjusted at least based on a signal received via the second antenna. 
 
 
     
     
       2. The electronic device of  claim 1 , wherein the first and second reference signals each comprise a sounding reference signal (SRS) for multi-antenna signal processing via uplink channel state measurement. 
     
     
       3. The electronic device of  claim 1 , wherein the communication processor is configured to control to transmit antenna-related information to the base station. 
     
     
       4. The electronic device of  claim 3 , wherein the communication processor is configured to:
 receive, from the base station, transmit time point information related to a transmit time point for reference signals which correspond to each antenna among the plurality of antennas, and 
 control to transmit each of a plurality of reference signals at different times via a specified antenna among a plurality of antennas based on the received transmit time point information. 
 
     
     
       5. The electronic device of  claim 1 , wherein the second reference signal is adjusted at least based on a difference between strength of the signal received via the second antenna and strength of a signal received via the first antenna. 
     
     
       6. The electronic device of  claim 1 , wherein the second reference signal is adjusted further based on a difference between path loss (PL) of a signal transmitted via the second antenna and path loss of a signal transmitted via the first antenna. 
     
     
       7. The electronic device of  claim 1 , wherein an amplitude of the second reference signal is adjusted at least based on the signal received via the second antenna. 
     
     
       8. The electronic device of  claim 1 , wherein a phase of the second reference signal is adjusted at least based on the signal received via the second antenna. 
     
     
       9. A method to transmit a reference signal in an electronic device comprising a communication processor, at least one radio frequency integrated circuit (RFIC) connected to the communication processor, at least one radio frequency front-end (RFFE) circuit connected to the at least one RFIC and configured to process a transmission signal, and a plurality of antennas connected via the at least one RFFE circuit, the method comprising:
 identifying a first transmit time point for transmitting a first reference signal via a first antenna among the plurality of antennas; 
 transmitting the first reference signal to a base station via the first antenna at the first transmit time point; 
 identifying a second transmit time point for transmitting a second reference signal via a second antenna among the plurality of antennas; and 
 transmitting the second reference signal, to the base station via the first antenna at the second transmit time point, the second reference signal being adjusted at least based on a signal received via the second antenna. 
 
     
     
       10. The method of  claim 9 , wherein the first and second reference signals each comprise a sounding reference signal (SRS) for multi-antenna signal processing via uplink channel state measurement. 
     
     
       11. The method of  claim 9 , further comprising:
 transmitting antenna-related information to the base station. 
 
     
     
       12. The method of  claim 11 , further comprising:
 receiving, from the base station, transmit time point information related to a transmit time point for reference signals which corresponds to each antenna among the plurality of antennas; and 
 transmitting each of a plurality of reference signals at different time via a specified antenna among a plurality of antennas based on the received transmit time point information. 
 
     
     
       13. The method of  claim 9 , wherein:
 the second reference signal is adjusted at least based on a difference between strength of the signal received via the second antenna and strength of a signal received via the first antenna. 
 
     
     
       14. The method of  claim 9 , wherein the second reference signal is adjusted further based on a difference between path loss (PL) of a signal transmitted via the second antenna and path loss of a signal transmitted via the first antenna. 
     
     
       15. The method of  claim 9 , wherein an amplitude of the second reference signal is adjusted at least based on the signal received via the second antenna. 
     
     
       16. The method of  claim 9 , wherein a phase of the second reference signal is adjusted at least based on the signal received via the second antenna.